Limiting diversity selection genetic. Medical search. Frequent questions

The genetic composition of local populations can be shaped by alleles contributed by founding landraces, as well as by the divergence of these populations from the ancestral population of landraces," the researchers added. (genomeweb.com)
Further, different genomic regions appeared to be under selection in winter wheat and spring wheat populations. (genomeweb.com)
Twenty percent of those SNPs were also linked to genetic differentiation between the populations. (genomeweb.com)
Because the population size at the margin is likely to be smaller, genetic drift can have a larger effect and reduce the genetic variation of marginal populations. (wikipedia.org)
Reduced gene flow between central and peripheral populations also limits the genetic diversity at the margins. (wikipedia.org)
However, relatively few studies of quantitative trait evolution include ethnically diverse populations, which often harbor the highest levels of genetic and phenotypic diversity. (nih.gov)
Results indicated that Sowetans, and other southeastern Bantu-speakers, are a clearly distinct group from other African populations previously investigated, reflecting a unique genetic history with small, but significant contributions from diverse sources. (biomedcentral.com)
However, there are multiple strains of influenza A viruses circulating in swine populations making swine flu vaccine strain selection difficult. (cdc.gov)
Sliding-window analyses of nucleotide diversity and frequency spectrum, as well as haplotype diversity and phylogenetically inferred haplotype structure, revealed that CYP3A4 and CYP3A7 had recently undergone or were undergoing a selective sweep in all three populations, whereas CYP3A43 and CYP3A5 were undergoing a selective sweep in non-Africans and Caucasians, respectively. (nih.gov)
A maximum likelihood method that we developed for detecting selection on natural populations also suggests disruptive selection during the epidemic: the distribution of susceptibilities in the population shifted from unimodal prior to the epidemic to bimodal after the epidemic. (biomedcentral.com)
However, examples of parasite-mediated selection on host populations are limited. (biomedcentral.com)
Limited habitat availability has played a major role in structuring populations of species both in the past and in the present day. (bas.ac.uk)
The genetic diversity of Australian sorghum breeding populations has declined partially as a result of selection for sorghum midge ( Stenodiplosis sorghicolar (Coquillett)) resistance and stay-green (a drought resistance trait). (cropscience.org.au)
Wild relatives of sorghum represent a potentially valuable source of novel alleles to diversify Australian sorghum breeding populations, enhance yield advance and reduce genetic vulnerability. (cropscience.org.au)
Selection for adaptation, productivity and quality attributes in pedigree breeding programs will result in the development of populations of breeding lines that are enriched with favourable linkage blocks and epistatic complexes. (cropscience.org.au)
In hybrid crops such as grain sorghum, there is a requirement to maintain genetic diversity within male and female breeding populations, but also to exploit heterosis by maximising the genetic distance between male and female breeding populations. (cropscience.org.au)
A diverse selection scheme was applied to capture most of the genetic trait-variability or genetic diversity and superior lines in these populations. (usda.gov)
In 2014-2016 the diversity of these populations was evaluated based on four agronomic and thirteen morphological traits to determine differences in response to multiple irrigation rates. (usda.gov)
2018. Artificial barriers prevent genetic recovery of small isolated populations of a low mobility freshwater fish. (genotoul.fr)
Finally, we review advances in avian malaria management in vulnerable bird populations including genetic modification methods suitable for limiting the effects of this disease in wild populations and the use of sterile insect techniques to reduce vector abundance. (biomedcentral.com)
Studies have shown that cultivars of the carrageenophytes Kappaphycus and Eucheuma are clones of a limited number of strains originally domesticated from wild populations. (hal.science)
Katherine Carbeck, a doctoral candidate at the University of British Columbia , explains that while "locally adapted" populations are known to exist, the precise genetic mechanisms that enable such adaptations have been elusive until now. (earth.com)
The existence of 'locally adapted' populations implies that natural selection has shaped the genetic makeup of song sparrow populations across their range, enabling individuals to survive and reproduce in drastically different climatic conditions," said Carbeck. (earth.com)
The adaptability of these populations to climate change is conceivable, provided that habitat conditions support the free movement of individuals and their genetic material. (earth.com)
Finally, we recommend our approach for population genetic analyses of other Senepol populations and future genetic monitoring of inbreeding in Senepol herds. (cipav.org.co)
This work aimed to determine the genetic diversity and structure of six natural populations of Z. furfuracea throughout their known distribution range. (ntu.edu.tw)
2004. Identifying adaptive genetic divergence among populations from genome scans. (ntu.edu.tw)
Then a set of 12 diverse Lantana tissue samples that encompassed several species and varieties from populations across the Australian and native ranges was characterised for 12 chloroplast loci and one nuclear locus in order to identify potentially useful genetic markers. (anbg.gov.au)
In a recent commentary , McCarthy and Birney argue that these studies can provide an evidentiary path to personalized medicine - but only if they are done in diverse populations, and integrate rare and common genetic risk factors with measurements of changing environments and health indices over time. (cdc.gov)
Just as with genetic risk, epidemiologic models based on narrowly selected populations (such as well-off, well-educated volunteers) may not translate accurately to other communities. (cdc.gov)

The ecosystem that was there, with all its species diversity, genetic variation, and intricate interrelationships, is still irrevocably lost. (vnps.org)
However, higher densities of short production-cycle domestic animals, such as pigs and, in particular, poultry, introduce a vulnerability because such animals usually have limited genetic variation. (medscape.com)
We comprehensively investigated the nucleotide diversity and haplotype structure and examined the possible role of natural selection in shaping the sequence variation throughout the gene cluster. (nih.gov)
The Section investigates the role of genetic variation both within species and across species. (nih.gov)
At the molecular level, the Section explores the role of individual functional loci, gene networks, neurocircuits and endocrine pathways that have been specifically implicated, and also studies these phenomena using high throughput genomics technologies that can capture genetic, epigenetic and gene expression variation genome-side, and without reference to previous hypotheses. (nih.gov)
Examining how genes influencing behavior differ along the primate lineage - convergent evolution and orthologous genetic variation. (nih.gov)
The paper, co-authored by Kristen Savell, a third-year doctoral student in the Department of Anthropology, is among the first to document how evolutionary selection has shaped variation in human limbs across the globe. (phys.org)
This article explores evolution from an informational perspective, delving into the mechanisms behind genetic variation, natural selection, and speciation. (raisinrats.com)
This genetic variation provides the raw material upon which natural selection acts. (raisinrats.com)
In a new study, scientists have unraveled the genetic underpinnings that account for the significant variation in body size among song sparrows, a songbird species well-recognized across North America. (earth.com)
Dr. Jen Walsh, a co-author from the Cornell Lab of Ornithology, highlights the rarity of identifying a limited number of genes with a substantial impact on body size variation. (earth.com)
To determine the genetic variation, ten molecular markers of repeated simple sequences (SSR) were used. (ntu.edu.tw)
An assessment of the amount of interpopulation/race genetic variation of this weed species within Australia and the processes that structure this variation. (anbg.gov.au)
This effect is likely to influence results from mechansistic analysis and/or drug screeining efforts, and establishes importance of cereful model system selection based on genetic variation profile. (biomedcentral.com)
Predictive selection of variants with physiological effect is limited by the paucity of the quantitative systematic analysis of cellular contributors to variation in both tissues and cell lines. (biomedcentral.com)

They added that a number of regions that appeared to be under selection included genes linked to agronomically important traits, like Rht-B1 as well as Ppd-B1 and Vrn1 - both of which are associated with day-length insensitivity and flowering time - and Sr36, which is linked to fungal pathogen resistance. (genomeweb.com)
The English bulldog's limited genetic diversity could minimize the ability of breeders to recreate healthy phenotypes from the existing genetic stock, which were created by human-directed selection for specific desired physical traits. (sciencedaily.com)
Mapping Switchgrass Traits with Common Gardens The combination of field data and genetic information has allowed researchers to associate climate adaptations with switchgrass biology. (doe.gov)
The benefits that can come of genetic engineering would seem unending: the potential for a society without imperfections, low intelligence or disagreeable personality traits. (cram.com)
Since then, she has established environment-dependent roles for functional CRH, OPRM1, and NPY variants, postulated to occur through traits that are under natural selection. (nih.gov)
This also allows us to determine how the genetic traits will align with each pairing. (canecreekgoldendoodles.com)
In Australian sorghum breeding programs, strong selection for resistance to the sorghum midge (Stenodiplosis sorghicolar (Coquillett) ), stay-green (a drought resistance trait) and other agronomic traits has been associated with a decline in genetic diversity as measured by molecular markers. (cropscience.org.au)
We identified 241 novel EST-SSR and G-SSR markers in J. curcas , which should be useful for genetic mapping and quantitative trait loci analysis of important agronomic traits. (biomedcentral.com)
The study supports the idea that multiple forces, created by the interaction of traits through genetic correlation, influence human shape and size in combination with responses to natural selection dictated by the environment. (phys.org)
To this respect, post-genomic era studies including transcriptomics, metabolomics and proteomics provide a wide and unbiased view of plant physiology and biochemistry under adverse environmental conditions that, along with high-throughput phenotyping, could contribute to the characterization of plant genotypes exhibiting physiological and/or genetic traits that are correlated to abiotic stress tolerance. (frontiersin.org)
That's because genetic engineering can address only a single gene at once, but qualities like drought resistance are usually complex, multi-gene traits. (naturalnews.com)
This research established the importance of different traits for the selection of drought tolerant lines and identified a few lines with potential for possible public germplasm release. (usda.gov)
In this study, for the first time the novel variability or genetic diversity of morphological and agronomic traits possibly created by the chemical mutagen Ethyl MethaneSulfonate (EMS) was assessed and explored to improve drought tolerance in cotton (G. hirsutum L.) by traits' response/plant stress with different irrigation regimes. (usda.gov)
Traits such as total number of bolls, bolls retained at node 7 and below, and those retained between nodes 8 and 12, and bolls retained at node of first fruiting branch may be predictors to improve cotton production (yield) in water limiting environments. (usda.gov)
Various concerns have been raised regarding possible unintended consequences of widespread selection on PrP genotype, including impacts on other performance traits and possible effects on inbreeding and genetic diversity. (vetres.org)

The magnificent range of phenotypic diversity seen in song sparrows suggest they offer exciting opportunities to identify genes underlying a host of well-known and generally accepted eco-geographic rules. (earth.com)
We now know that phenotypic diversity in Lantana greatly exceeds the diversity at loci commonly used for measuring species relationships. (anbg.gov.au)

The geographical limits to the distribution of a species are determined by biotic or abiotic factors. (wikipedia.org)
The inability of a species to expand its range beyond a certain geographic area is because of some limiting factor or factors to which the species cannot successfully adapt. (wikipedia.org)
In some cases, geographical range limits are entirely predictable, such as the physical barrier of an ocean for a terrestrial species. (wikipedia.org)
For many species of invertebrate animals, the exact geographic range limits have never been precisely ascertained, because not enough scientific field work has been carried in many parts of the world to map distribution more precisely, therefore finding a range extension for species, especially marine species, is not an uncommon occurrence. (wikipedia.org)
All species have limits of tolerance to abiotic factors. (wikipedia.org)
Precipitation can also be a key determinant in limiting the geographic range edges of species. (wikipedia.org)
One interaction that may limit a distribution is predation, where prey species are limited from a particular area by very efficient predators, or where these predators may permit certain prey to have larger ranges. (wikipedia.org)
Higher genetic diversity within a host species is often associated with differences in susceptibility to infection, thereby limiting the potential for infections to spread rapidly. (medscape.com)
Studies on Antarctic species represent some of the best examples of natural selection at the molecular, structural and physiological levels. (bas.ac.uk)
In some cases, genetic studies have revealed that species defined by morphological characters are complexes of cryptic or sibling species. (bas.ac.uk)
She is especially interested in studying functionally similar genetic variants that have arisen in multiple species. (nih.gov)
In certain instances, genetic variants that are functionally similar or orthologous to those that moderate risk for human psychiatric disorders are maintained across primate species. (nih.gov)
By using these markers, we found that the intergroup gene diversity of J. curcas was greater than the intragroup diversity, and that the domestication of the species probably occurred partly in America and partly in Hainan, China. (biomedcentral.com)
The identification of these eight specific genetic variants not only corroborates Bergmann's rule but also enhances our understanding of evolution, natural selection, and climate interactions throughout the history of species. (earth.com)
This study reveals the 'Capulteolt' population's low genetic diversity as well as the presence of increased differentiation in the geographical limits of the species' distribution range. (ntu.edu.tw)
The production of molecular and morphological based evaluations of species and genetic diversity to assess phylogenetic relationships and implications for selection of biocontrol agents. (anbg.gov.au)

The researchers sought to identify whether there is enough genetic diversity still existing within the breed to undertake significant improvements from within the existing gene pool. (sciencedaily.com)
Pfs47 is a polymorphic gene with signatures of diversifying selection and a strong geographic genetic structure. (nih.gov)
To test this, four lines with the same genetic background were generated, in which the Pfs47 gene was deleted and complemented with the most representative haplotypes of Pfs47 from each continent. (nih.gov)
Dr. Mae-Wan Ho said, "Genetic engineering is inherently dangerous, because it greatly expands the scope for horizontal gene transfer and recombination, precisely the processes that create new viruses and bacteria that cause disease epidemics, and trigger cancer in cells. (cram.com)
Gene action is dependent on environmental and developmental contexts, including stress exposures, maternal behavior and rearing patterns, and including trans-generational transmission of behavior through non-genetic and epigenetic mechanisms. (nih.gov)
Over many generations, genetic variations can accumulate within a population through mechanisms such as mutation, genetic recombination, and gene flow. (raisinrats.com)
These variations introduce new alleles into the gene pool, allowing for increased diversity within a population. (raisinrats.com)
The Texas High Plains often has extended periods between rainfall events, which can lead to a reduction in the yield and fiber quality of cotton (Gossypium hirsutum L.). It is known that cultivated cotton suffers from low levels of genetic diversity due to the over-use in breeding of similar gene pools or elite germplasm, which may hinder breeding for drought tolerance. (usda.gov)
Research relevant to this area includes studies on microbial biofilms and ecology including on the formation, structure, modulation and eradication of oral biofilms, host status changes that affect the emergence of infectious agents, horizontal gene exchange that affects genetic diversity and antibiotic resistance, microbial stress responses, interactions that increase organism virulence, and environmental selection of new genetic strains and variants. (nih.gov)
This study describes fine mapping of the resistance gene, analysis of nucleotide polymorphism and linkage disequilibrium in the Tvr1 region, and development of molecular markers for marker-assisted selection. (biomedcentral.com)
This study confirms that there is a limited gene pool within cultivars in Malaysia and suggests the need for new or genetically diverse cultivars which can adapt to a changing environment, to ensure a more sustainable carrageenan industry. (hal.science)

Both landraces and cultivars, the researchers found, have similar levels of genetic diversity. (genomeweb.com)
Low levels of genetic diversity in a hybrid breeding program can lead to increased vulnerability to unexpected pest or disease outbreaks, reduced genetic progress via plant breeding and limited expression of heterosis in F1 hybrids. (cropscience.org.au)

NEW YORK (GenomeWeb News) - An international team of researchers looking into genomic patterns in wheat has developed a map of genetic variability and unearthed alleles that were subject to selection, according to a study published in the Proceedings of the National Academy of Sciences yesterday. (genomeweb.com)
These studies revealed remarkable levels of genetic variability and evidenced the utility of such markers for forensic and relatedness analyses. (cipav.org.co)

Analyses of molecular genetics data are consistent with the diversity and distribution of marine and terrestrial taxa having been strongly influenced by geological and climatic cooling events over the last 70 Myr. (bas.ac.uk)

The 134 landraces analyzed contained nearly all the alleles found in the 2,860 cultivars - only 1.3 percent of the variants were limited to the cultivars. (genomeweb.com)
Selection for new antigenic strains that can escape pre-existing human immunity leads to the extinction of previously circulating variants when new ones emerge. (nih.gov)
Her research focuses on identification of functional genetic variants that influence reward sensitivity and stress reactivity in nonhuman primates. (nih.gov)
For the development and selection of new cultivars, it is important that a comprehensive record of available variants exists. (hal.science)
The study hones in on eight genetic variants that are predominantly responsible for the body size disparity in song sparrows, which can range nearly threefold from Mexico to Alaska. (earth.com)
Risk scores that integrate information on common and rare variants will produce more precise individual estimates of genetic risk than those based on either alone. (cdc.gov)

If the seeds that exist have limited genetic diversity, then new strains may not be able to be bred fast enough. (naturalnews.com)
This panel of 14 selected isolates (11 isolated from spoiled canned food and three reference strains), were whole genome sequenced, but no association of physiological and genetic characteristics could be detected. (hal.science)

The heat resistance of the spores was studied for 2 min and 10 min at 102 °C and 110 °C. This physiological study (pH, NaCl growth limits and heat resistance) allowed the selection of 14 isolates of C. sporogenes (twelve isolates) and Group I C. botulinum (two isolates) representative of the diversity found. (hal.science)

Some alleles, the researchers added, had a limited geographic range. (genomeweb.com)
These distinct patterns of geographic distribution of alleles subjected to selection can potentially be linked with adaptation to local environmental conditions," the study authors said. (genomeweb.com)
a historical reduction in the population size was observed, leading to the loss of some alleles by putative directional natural selection. (ntu.edu.tw)
The currently available genomes limit the understanding of its genetic diversity and the discovery of valuable alleles for breeding. (cnrs.fr)

However, our understanding of the evolutionary processes and underlying genetic mechanisms shaping these genes is limited in many taxa, including amphibians, a group currently impacted by emerging infectious diseases. (usgs.gov)
Theory readily predicts that parasites can promote host diversity through mechanisms such as disruptive selection. (biomedcentral.com)
However, the genetic mechanisms underlying Bergmann's rule have remained elusive until now. (earth.com)

Based on a combination of comparing genetic differentiation and pair-wise haplotype sharing, they found 21 regions in spring wheat and 39 regions in winter wheat that seemed to be under selection. (genomeweb.com)
The central‐marginal hypothesis, also sometimes called the "central-peripheral population hypothesis", posits that there is less genetic diversity and greater inter‐population genetic differentiation at the range margins, as compared to the range cores. (wikipedia.org)

As a result, our ability to project future evolutionary trajectories is limited. (nih.gov)
In particular, little is currently known about how mutations with different ages and fitness costs contribute to expected patterns of LD, even in simple settings where recombination and genetic drift are the major evolutionary forces. (stanford.edu)
Genetic variations are the source of evolutionary diversity and are grouped into three general categories: deleterious, neutral and beneficial. (biomedcentral.com)

These individuals were interrogated using a comparatively small selection of genetic markers (with the exception of Schlebusch and colleagues who typed ~2.5 million single nucleotide polymorphisms [SNPs]), restricting the information density. (biomedcentral.com)
Developmenrt of EST-SSR and genomic-SSR markers to assess genetic diversity in Jatropha Curcas L. (biomedcentral.com)
We used simple sequence repeat (SSR) markers that could be transferred from Manihot esculenta (cassava) to analyze the genetic relationships among 45 accessions of J. curcas from our germplasm collection. (biomedcentral.com)
However, the genetic map of J. curcas is not well-developed and very limited information is available with respect to molecular markers. (biomedcentral.com)
Finally, we used the transferable markers to analyze the genetic diversity of our collection of J. curcas accessions. (biomedcentral.com)
We are employing a variety of molecular genetic techniques, including DNA sequencing, microsatellites and AFLPs, in order to identify genetic markers for analysis of the evolution and introduction history of lantana. (anbg.gov.au)

Aims: We report the genetic, phenological, agronomic and ampelographic characterization of 27 minor grapevine accessions (Vitis vinifera L.) from the Balearic Islands (Spain). (researchgate.net)

We have identified a number of candidate selection targets associated with wheat improvement including regions containing genes involved in the regulation of flowering, development, and stress response," the researchers noted. (genomeweb.com)
This includes significant loss of genetic diversity in the region of the genome that contains many of the genes that regulate normal immune responses. (sciencedaily.com)
We reveal hundreds of genes and SVs that may contribute to the artificial selection (domestication and breeding) of silkworm. (cnrs.fr)

DNA analysis is needed to measure, monitor and maintain genetic diversity. (sciencedaily.com)

So the goal of this webinar, as I said, is to identify research priorities for research on the genomics and genetic susceptibility to ME/CFS. (nih.gov)
And we're really very excited about this webinar because I think we're going to be hearing information that we have not seen presented before about genomics and genetic susceptibility. (nih.gov)

In variety regulation, simpler registration procedures are required, and the demands of plant variety protection should not be allowed to bias or limit the development and use of public and farmer varieties. (indiana.edu)

The mean susceptibility of clones collected from the population before and after the epidemic did not differ, but clonal variance and broad-sense heritability of post-epidemic clones were significantly greater, indicating disruptive selection and rapid evolution. (biomedcentral.com)

Genetic diversity is essential for a population's chance to survive and flourish. (cram.com)

Genetic diversity has been reduced by three distinct bottleneck events, namely the limited historical importation of a small subset sampling of a few honey bee subspecies, the selection pressure of parasites and pathogens (particularly parasitic mites) and the consolidated commercial queen-production practices that use a small number of queen mothers in the breeding population," Cobey pointed out. (farmprogress.com)
The U.S. ban on the importation of bees in 1922 to ward off a tracheal mite (Acarapis woodi) further aggravated the genetic bottleneck. (farmprogress.com)

These values evidenced elevated levels of polymorphism and an underestimation of genetic diversity through the use of manual genotyping methods. (cipav.org.co)

Marker-assisted selection for dieback resistance with HRM is now an integral part of our breeding program that is focused on the development of improved lettuce cultivars. (biomedcentral.com)
Since there are no known methods to prevent the disease in a lettuce crop grown in an infested field, genetic resistance remains the only option for disease control [ 1 ]. (biomedcentral.com)

The mosquito immune system can greatly limit infection and P. falciparum evolved a strategy to evade these responses mediated by Pfs47. (nih.gov)

The lack of local genetic information with robust allele frequency distributions currently serves as a significant hurdle to designing biomedical research and may have important medical implications. (biomedcentral.com)
However, this approach is expensive as well as time and effort consuming, but also allele scoring is prone to errors, thus limiting practicity, replicability and reliability. (cipav.org.co)

The Antarctic biota is highly endemic, and the diversity and abundance of taxonomic groups differ from elsewhere in the world. (bas.ac.uk)

By examining haplotype sharing between spring wheat population, winter wheat population, and a mixed population, the researchers uncovered 308 SNPs that exhibited evidence of selection. (genomeweb.com)
The high genetic diversity of Pfs47 detected in Africa is reduced in Asia and has only one representative haplotype in the Americas. (nih.gov)

This is the first broad-based assessment of genetic diversity in the English bulldog using DNA analysis rather than pedigrees. (sciencedaily.com)

One explanation involves frequency-dependent selection by parasites resulting from host-parasite genotype interactions. (biomedcentral.com)

Within any population, there exists genetic diversity due to mutations and recombination during sexual reproduction. (raisinrats.com)

This finding suggests that independent selection of resistant mutants occurs frequently. (cdc.gov)
The estimated mean genetic diversity index was 0.5572, which suggests that our J. curcas germplasm collection has a high level of genetic diversity. (biomedcentral.com)
This suggests that functional diversity in weedy Lantana is at the sub-specific level. (anbg.gov.au)

These could also have greatly diminished genetic diversity. (sciencedaily.com)
This idea would be greatly affected by a lack of genetic diversity. (cram.com)

Thus, our ability to draw inferences about quantitative trait adaptation has been limited. (nih.gov)

To exemplify the contribution of such a host genetic factor to Because we are most concerned with understanding the severity of HIV prevalence trends, we consider a well-characterized 32-bp the epidemic in developing countries where the majority of infec- deletion in the host-cell chemokine receptor CCR5, CCR5 32. (nih.gov)
These results provide rare empirical support for parasite-driven increases in host genetic diversity, and suggest that this increase can occur rapidly. (biomedcentral.com)

Unfortunately eliminating all the mutations may not solve the problem as this would further reduce genetic diversity. (sciencedaily.com)

Increasing the overall genetic diversity of honey bees will lead to healthier and hardier bees that can better fight off parasites, pathogens and pests, says bee breeder-geneticist Susan Cobey of the University of California, Davis and Washington State University. (farmprogress.com)
The outcome of a genetic change largely depends on overall genetic background [ 1 , 10 ]. (biomedcentral.com)

I show that the dynamics of linkage disequilibrium become much simpler in the limit that mutations are rare, where they admit a simple heuristic picture based on the trajectories of the underlying lineages. (stanford.edu)

The femur does not change length in response to directional natural selection at all. (phys.org)

Moisture in the soil can also put limits on the distribution of an organism. (wikipedia.org)
Genetic engineering is the deliberated modification of the characteristics of an organism by manipulation its genetic material. (cram.com)

Due to the unparalleled genetic diversity of its peoples, Africa is attracting growing research attention. (biomedcentral.com)

Population genetic parameters, combined probability of identity (CPI) and combined probabilities of exclusion (CPE) were estimated. (cipav.org.co)

Although complete genome sequence exists for sweet orange ( Citrus sinensis ) and clementine ( Citrus clementina ), olive tree ( Olea europaea ) and grapevine ( Vitis vinifera ), the development of biotechnological tools to improve stress tolerance still relies on the study of the available genetic resources including interspecific hybrids, naturally occurring (or induced) polyploids and wild relatives under field conditions. (frontiersin.org)

The effects of genetic engineering on animal health and welfare are of significant public concern (Mench, 1999). (nationalacademies.org)

The preliminary findings are consistent with the original survey, and if confirmed then these findings will result in a paradigm shift in our understanding of the source of diversity within Lantana. (anbg.gov.au)

The goal of this study was to profile the allelic structure across the human CYP3A locus and investigate natural selection on that locus. (nih.gov)
Neutrality tests with Tajima's D , Fu and Li's D* and F* , and Fay and Wu's H indicated possible roles of positive selection on the entire CYP3A locus in non-Africans. (nih.gov)

2000). While this limits the number of recipient animals used, it also raises welfare concerns over the repeated exposure of individual animals to procedures likely to cause pain and distress. (nationalacademies.org)

Understanding these fundamental concepts of evolution allows us to appreciate the incredible diversity of life on Earth and how it has come to be. (raisinrats.com)

Snapshots of clinical and laboratory measurement may have limited predictive ability, whereas the availability of longitudinal data (e.g., electronic health records, wearable devices) could improve prediction. (cdc.gov)

The resulting data are thus not ideal as a suitable reference resource that captures the genetic diversity of the region's dominant ethnolinguistic group. (biomedcentral.com)

1994. Ecological and genetic factors in conservation: a cautionary tale. (ntu.edu.tw)

Yet in contrast to single-site analogues like the site frequency spectrum, our theoretical understanding of linkage disequilibrium remains limited. (stanford.edu)

In plant breeding, more emphasis should be placed on decentralising variety testing, breeding for particular niches, and making site selection, trial management and analysis more representative of farmers' conditions. (indiana.edu)
The remarkable part of this story is that this variety was maintained through thousands of years of hand-pollination and seed selection by individual farmers and communities. (naturalnews.com)

We hypothesize that the reduced genetic diversity of Pfs47 in Asia and the Americas, is due, at least in part, to natural selection of the parasite by the immune system of evolutionarily distant anophelines. (nih.gov)
Charles Darwin termed natural selection. (cram.com)
Natural selection says that the fittest individuals in nature will succeed and reproduce. (cram.com)
Here, we document parasite-mediated disruptive selection on a natural Daphnia population during a parasite epidemic. (biomedcentral.com)
They found that two of the bones-the forearm (radius) and lower leg (tibia)-as well as overall body size did appear to evolve in direct response to natural selection as expected, becoming shorter at higher latitudes . (phys.org)
The growth of the arm (humerus) and thigh (femur), however, are influenced by more than just the direct response to natural selection. (phys.org)
Savell and colleagues also found that natural selection alone would drive the humerus to lengthen at higher latitudes with colder climates. (phys.org)
This finding is contrary to Bergmann's and Allen's rules, which suggest natural selection would push the arm to shorten with higher latitudes. (phys.org)
The response of the tibia and radius to natural selection, and their genetic relationship with the humerus, overcame the direct effects of natural selection on the humerus. (phys.org)
Constraint, natural selection, and the evolution of human body form, Proceedings of the National Academy of Sciences (2016). (phys.org)
This process is known as natural selection, which acts as a driving force for evolution. (raisinrats.com)

This suggested to the researchers that "most of the diversity present in the modern cultivars was also present in landraces. (genomeweb.com)
The present study analyzed the cox 2-3 spacer and cox 1 (1356 bp) genetic diversity of cultivars collected from 2019 to 2020 from the east coast of Sabah where the seaweed farms are concentrated. (hal.science)

We would also question whether further modifications, such as rapidly introducing new rare coat colors, making the body smaller and more compact and adding more wrinkles in the coat, could improve the bulldog's already fragile genetic diversity. (sciencedaily.com)
Our initial strategy rapidly placed an upper bound on the phylogenetic diversity within weedy Lantana in Australia. (anbg.gov.au)

Selection was carried out over the following three generations of self-pollination for plants which did not shatter and which had appropriate height and maturity for yield testing. (cropscience.org.au)
EMS yield performance was possibly constrained by the applied diverse selection scheme of this study. (usda.gov)

However, the understanding of this crop remains very limited and little genomic research has been done. (biomedcentral.com)
Both of these are undercut by loss of crop diversity and the concentration of seeds in the hands of a few companies. (naturalnews.com)

Anatomy5

Organisms37

Chemicals and Drugs27

Analytical, Diagnostic and Therapeutic Techniques and Equipment39

Psychiatry and Psychology6

Phenomena and Processes117

Disciplines and Occupations13

Anthropology, Education, Sociology and Social Phenomena7

Technology, Industry, Agriculture8

Information Science8

Health Care39

Geographicals13

Populations30

Variation15

Traits15

Phenotypic diversity2

Species16

Gene11

Levels of genetic diversity2

Variability2

Analyses1

Variants6

Strains2

Physiological1

Alleles4

Mechanisms3

Differentiation2

Evolutionary3

Markers6

Agronomic1

Genes3

Maintain genetic diversity1

Genomics2

Varieties1

Susceptibility1

Population's1

Bottleneck2

Polymorphism1

Resistance2

Infection1

Allele2

Endemic1

Haplotype2

Assessment1

Interactions1

Recombination1

Suggests3

Greatly2

Quantitative1

Host genetic2

Reduce genetic1

Overall genetic2

Mutations1

Directional1

Organism2

Africa1

Population genetic1

Genome1

Effects of genetic1

Source of diversity1

Locus2

20001

Incredible diversity1

Predictive1

Suitable1

Ecological1

Linkage1

Farmers2

Natural11

Cultivars2

Rapidly2

Yield2

Crop2